See the tunnel painting "Battle of Foteviken" by the graffiti artist William "Swet" Hjort. It was inaugurated on the 4th of July in 2017.
The battle took place in the year 1134 on the 4 of June at a location near Fotevikens Museum and the story is retold in the images of the painting. You can read the full story of the battle here.
The painting can be found in the bicycle and pedestrian tunnel leading toward the museum, under Highway 100, south west of the large roundabout in Höllviken.